Without further ado, the following was found: Issue: alphabetic? Do you mean alphabet? "If case-independent matching is specified, the effect is much as if all case " "distinctions had vanished from the alphabet. When an alphabetic that exists " "in multiple cases appears as an ordinary character outside a bracket " "expression, it is effectively transformed into a bracket expression " "containing both cases, for example, \\[aq]x\\[aq] becomes \"I<[xX]>\". When " "it appears inside a bracket expression, all case counterparts of it are " "added to the bracket expression, so that, for example, \"I<[x]>\" becomes " "\"I<[xX]>\" and \"I<[\\[ha]x]>\" becomes \"I<[\\[ha]xX]>\"."
